Allow input_select helper items to be inserted or reordered in the UI

[j9brown]

I use many input_select helpers to control aspects of my home automation. Often I want to insert an item at the beginning or middle of the list of drop-down items or rename an existing item.

Unfortunately, the configuration UI only supports adding new items to the end of the list. So when I want to make a change further up the list, I have to delete the element and all of its successors then type them back in one at a time.

One solution to this problem might be to add an affordance to allow items in the input_select helper dropdown configuration UI to be dragged and reordered.

[matthiasdebaat]

Same as #10106. There has been some work in progress on this, but isn't fixed yet #10107 (comment)